Miniaturised unequal Wilkinson power divider using lumped component elements

A compact two-way unequal Wilkinson power divider with a power division ratio of 2 is proposed. The proposed design can reduce more than 75% of the occupied area, compared with the conventional unequal power divider using composite transmission line. In the proposed design, the total transmission-line length is much less than conventional one. A resistor and a compensative capacitor are used to isolate output ports. The proposed divider is designed, fabricated and tested. The results show that at the designed frequency of 1.5 GHz, the input return loss (s11) and output return losses (s22, s33) are better than 20 dB and the output ports isolation (s23) is better than 25 dB.